Theory of Pinning Effect on the Nonlinear Resistancein the Mixed State of Type II Superconductors

概要

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A mechanism is proposed for the nonlinear flux flow resistance in the mixed state of type II superconductors. Beside of the frictional drag which is responsible to the linear resistance, the flux line motion is subjected to the pinning effects, which are appreciable especially when the Lorentz-like driving force is small, that is to say, in the small current region. The flux line is pinned down for a time _%<τ_γ>, which decreases with the increase of the Lorentz-like force, at each pinning center and for the rest time _<τ_γ>, no voltage appears while the currents flow. The dislocation-immigration analogue in the imperfect lattice is used for the line motion to calculate _<τ_γ> and the result shows the nonlinear resistance in good agreement with the experimental results.
社団法人応用物理学会の論文
1969-06-05